Simplify commands for getting a random UUID
Simplify commands for getting a random UUID

The Kernel can give you a random identifier out of the box, not need for hashing random bytes yourself. The UUIDs are randomized every time you read from the device:

```
% cat /proc/sys/kernel/random/uuid /proc/sys/kernel/random/uuid
8cbcbd51-721e-4423-a1e1-2b7b9f3f5424
c99313d5-d8ec-48d1-a750-e4c170e7d41d
```

RELNOTES: None
PiperOrigin-RevId: 323813058

perezd/bazel,perezd/bazel,werkt/bazel,ButterflyNetwork/bazel,bazelbuild/bazel,katre/bazel,davidzchen/bazel,meteorcloudy/bazel,meteorcloudy/bazel,perezd/bazel,cushon/bazel,bazelbuild/bazel,twitter-forks/bazel,meteorcloudy/bazel,katre/bazel,ButterflyNetwork/bazel,cushon/bazel,davidzchen/bazel,ButterflyNetwork/bazel,werkt/bazel,bazelbuild/bazel,werkt/bazel,werkt/bazel,meteorcloudy/bazel,katre/bazel,bazelbuild/bazel,twitter-forks/bazel,katre/bazel,meteorcloudy/bazel,ButterflyNetwork/bazel,davidzchen/bazel,bazelbuild/bazel,meteorcloudy/bazel,twitter-forks/bazel,davidzchen/bazel,perezd/bazel,perezd/bazel,safarmer/bazel,safarmer/bazel,ButterflyNetwork/bazel,safarmer/bazel,davidzchen/bazel,davidzchen/bazel,werkt/bazel,cushon/bazel,safarmer/bazel,werkt/bazel,katre/bazel,cushon/bazel,cushon/bazel,twitter-forks/bazel,twitter-forks/bazel,perezd/bazel,cushon/bazel,twitter-forks/bazel,bazelbuild/bazel,ButterflyNetwork/bazel,safarmer/bazel,davidzchen/bazel,katre/bazel,perezd/bazel,twitter-forks/bazel,safarmer/bazel,meteorcloudy/bazel